DEIF DVC 550 Digital Voltage Controller AVR 7 A

A digital AVR with power-factor and kVAr regulation

The DEIF DVC 550 is a digital automatic voltage regulator that monitors and regulates the alternator output with rated field current up to 7 A. It suits SHUNT, AREP (auxiliary winding) and PMG (permanent magnet) excitation and adjusts the exciter field current to hold the set alternator output. Beyond plain voltage control it offers five regulation modes, so it can also run a set at a fixed power factor or reactive power when paralleled.

Technical specifications

Regulation modes and protections

The five modes are voltage, field current (manual), generator power factor, generator kVAr and grid power factor. Regulation features include voltage equalisation, droop management, soft start, a load acceptance module (L.A.M.) for heavy load events and negative field forcing. Protection functions cover under and over voltage, under and over frequency, active and reactive reverse power, synchro check, open and shorted diode failures, with response times under 400 ms for short circuit, loss of voltage reference, over-excitation, high temperature, speed drop and stator current events.

Configuration uses DEIF EasyReg Advanced over USB, and the unit is powered from the USB connection during setup. It also includes an event log and data logger option.

Controllers and ordering

The DVC 550 works with the AGC-4 (software 4.75.x or later, requiring option T2), AGC-4 Mk II (6.00.x or later) and AGC 150 (1.03.x or later), and the iE 150 is listed as supported. A connector kit (2913940150.05) is included with the unit. Confirm the excitation type, field current and resistance and the controller software version. The DVC 350 page covers the 5 A model.

The terminal side carries LED indication, the CAN J1939 port, analogue inputs and outputs, relay outputs, digital inputs and outputs, the USB port, temperature sensor inputs (PTC or Pt100), current transformer inputs, alternator voltage sensing, mains sensing on L1 and L2, the DC supply and the excitation output F+ and F-. The field supply is wired to X1, Z1, X2 and Z2 for AREP, to X2, X1 and Z2 for PMG and to X1 and X2 for SHUNT. CT input U is used for paralleling and measurement, while V and W are for measurement only. Accuracy classes are 0.5 for AC voltage, 0.2 for frequency, 2.5 for AC current, 5 for field excitation current, 2 for Pt100 inputs and 1 for analogue inputs. Vibration is rated 3.5 mm from 3 to 25 Hz and 4.4 g from 25 to 100 Hz, and shock is 50 g for 11 ms.

How the DEIF DVC 550 works

The controller measures the alternator voltage. It compares the value with the set point. It then adjusts the current in the exciter field. The alternator output stays at the set level as the load changes.

Where the DVC 550 is used

• Generator sets with SHUNT excitation
• Generator sets with AREP excitation
• Generator sets with PMG excitation
• Paralleled generator sets
• Sets that run at a fixed power factor

Selection checklist for the DVC 550

• Excitation type
• Field current
• Field resistance
• Supply voltage
• Measurement voltage
• Regulation mode
• Communication needs
• Temperature inputs

Installation, commissioning and maintenance notes for the DVC 550

Mount the unit with clear space around it. Wire the field, the supply and the voltage measurement. Connect a PC by the USB port to set the parameters. Test each regulation mode on a running set. Save the settings after commissioning.

Requesting a quotation for the DEIF DVC 550

Please send the excitation type, the field current and the supply voltage. Seven Star LLC serves industrial customers in Oman and the GCC and replies with a quotation based on the information provided.

DVC 550 controller type

It is a digital automatic voltage regulator.

DVC 550 field current

The rated field current is up to 7 A.

DVC 550 field forcing

Field forcing gives 15 A for 10 seconds.

DVC 550 excitation types

It suits SHUNT, AREP and PMG excitation.

DVC 550 AC supply

The AC supply input is 50 to 277 V AC.

DVC 550 auxiliary supply

The auxiliary supply is 12 or 24 V DC.

DVC 550 voltage measurement

It measures generator voltage from 0 to 530 V AC.

DVC 550 frequency range

The frequency range is 30 to 400 Hz.

DVC 550 regulation modes

It has five regulation modes.

DVC 550 power factor

It can hold the generator at a fixed power factor.

DVC 550 reactive power

It can hold a fixed kVAr value.

DVC 550 load acceptance

A load acceptance module handles heavy load events.

DVC 550 digital I/O

It has 8 programmable digital I/O.

DVC 550 analogue I/O

It has 4 programmable analogue I/O.

DVC 550 temperature inputs

It has 5 temperature inputs for Pt100 or PTC sensors.

DVC 550 communication

It has a USB-B port and a CAN J1939 port.

DVC 550 ambient temperature

The ambient range is minus 40 to plus 70 degrees C.

DVC 550 size

The size is 200 x 127.5 x 58 mm.

Controller records for the DVC 550

Record the parameter set, the mode and the test results.

Choosing the right DVC 550 settings

Choose the settings from the alternator data sheet.

Documents and quotation

Attached: the DEIF DVC 550 data sheet 4921240606J (EN). When requesting a price, name the variant, options, number of units and what the controller will be wired to. See Diesel Generator Spare Parts for related DEIF controllers and generator control products.